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    <title>Document</title>
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    <script>
        // 求任意数组中的最大值并返回这个最大值
        function getSum(arr = []) {
            let max = arr[0]
            let min = arr[0]
            for (let i = 0; i < arr.length; i++) {
                max = max > arr[i] ? max : arr[i]
                min = min < arr[i] ? min : arr[i]
            }
            return [max, min]
        }
        let c = getSum([1, 2, 3, 4, 5])
        console.log(c);
    </script>
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